禁止同时开启多个实例

apex runner/Program.cs

@@ -1,22 +1,51 @@
 using System;
 using System.Collections.Generic;
+using System.Diagnostics;
 using System.Linq;
+using System.Runtime.InteropServices;
+using System.Threading;
 using System.Threading.Tasks;
 using System.Windows.Forms;
 
 namespace apex_runner
 {
     internal static class Program
     {
-        /// <summary>
-        /// 应用程序的主入口点。
-        /// </summary>
+
+        // 导入 Win32 API 用于设置前台窗口
+        [DllImport("user32.dll")]
+        private static extern bool SetForegroundWindow(IntPtr hWnd);
         [STAThread]
         static void Main()
         {
-            Application.EnableVisualStyles();
-            Application.SetCompatibleTextRenderingDefault(false);
-            Application.Run(new Form1());
+            // 使用互斥体确保只有一个实例运行
+            bool isNewInstance;
+            using (Mutex mutex = new Mutex(true, "MyUniqueAppName", out isNewInstance))
+            {
+                if (isNewInstance)
+                {
+                    /// <summary>
+                    /// 应用程序的主入口点。
+                    /// </summary>
+                    Application.EnableVisualStyles();
+                    Application.SetCompatibleTextRenderingDefault(false);
+                    Application.Run(new Form1());
+                }
+                else
+                {
+                    // 找到已经运行的实例，并将其激活到前台
+                    Process currentProcess = Process.GetCurrentProcess();
+                    foreach (Process process in Process.GetProcessesByName(currentProcess.ProcessName))
+                    {
+                        if (process.Id != currentProcess.Id)
+                        {
+                            SetForegroundWindow(process.MainWindowHandle);
+                            break;
+                        }
+                    }
+                }
+            }
+
         }
     }
-}
+}